Bag-tying machine



y 8, 1958 A. P. KRUEGER 2,841,935

BAG-TYING MACHINE Filed March 12, 1956 2 Sheets-Sheet 1 a 4| z o M 321INVENTOR BYq Z V ATTORNEYS July 8, 1958 Q A. P. KRUEGER BAG-TYINGMACHINE 2 Sheets-Sheet 2 Filed March 12, 1956 INVENTOR ATTORNEYS UnitStates 228M335 Patented July 8, 1958 tice BAG-ruins Machine Alfred P.Krueger, Southbury, Conn, assignor to Derby Sealers, Incorporated,Ansonia, Corns, corporation of Connecticut Application March 12, 1956,Serial No. 576L733 12 fllaims. (Cl. 53--l35) by means of a short lengthof a pressure-sensitive adhesive tape. This tape may be wrapped aroundthe neck of the bag, and the free ends of the tape brought together withtheir tacky surfaces in contact so that the length of tape will befastened around the neck of the bag to seal the latter, the free ends ofthe tape projecting from the bag in the form of a flag.

In general, the device comprises aframe upon which is mounted a supplyroll of'the tape to be used. A feed Wheel is provided upon the back ornontaclry side of the tape and adapted to liewith the free end of thetape spanning a notch in the wheel. The gathered end of the bag is thenplaced in this notch to be partly embraced by the tape, and the wheel isthen rotated by moving the bag when 'the latter is in the notch in thewheel. A wiping roller is provided to engage the leading end of thetape, or that end on the forward side of the notch in the wheel, wrap itaround the bag, and seal it against a similar length of tape on theopposite or trailing side of the notch. The tape is then severed and thebag withdrawn from the notch in a direction axially of the wheel tocomplete the operation.

One object of the present invention is to provide a bag tying machineadapted to seal the gathered end of a bag with a pressure-sensitiveadhesive tape.

A still further object of the invention is to provide a bag-sealingmachine of the character described which will be of simple construction,economic to manufacture, and, at the same time, efiicient and positivein operation.

Still another object of the invention is to provide a bag-sealingmachine which, when operated, will serve to wrap a length ofpressure-sensitive adhesive tape about the gathered neck of a bag, sealthe tape, and sever the tape from a length thereof delivered by a supplyroll upon movement of the bag through the machine.

To these and other ends the invention consists in the novel features andcombinations of parts to be hereinafter described and claimed. i

In the accompanying drawings:

Fig. 1 is a side elevational view of the bag-tying machine embodying myinvention;

Fig. 2 is a top plan view thereof;

'Fig. 3 is a partial side elevational view showing the side oppositethat side shown in Fig. 1,;

Fig. 4 is a sectional view through the wiping roller on line 4-4 of Fig.2; i

Fig. 5 is a sectional view on line 5--5 of Fig. 2 showingthe parts .inthe position at :the time of the beginning of the sealing operation; and

Figs. 6, 7 and S are views similar to Fig. 5, some parts being brokenaway for the sake of clearness showing the position of the parts duringvarious stages of the operation of the machine.

To illustrate one embodiment of the invention, there is shown in thedrawings a bag-tying machine having a frame consisting of a base 10 andupstanding spaced plates it and l2. The plate 11 may be provided alongits lower edge with a laterally extending plate 13 (Fig. 2), which maybe secured to the base by screws or other fastening members 14. Thecooperating plate .12 may be secured to the plate .11 by screws 15,which screws are embraced by spacing collars 116 to hold the two platesin spaced parallel relation.

it may be noted that the plate '11 is .of greater extent than the plate12, and upon the former is rotatably mount-ed a reel 17 adapted to holda supply roll of tape 13. In order to supply alen'gth of tape, shown at19, to the tying mechanism to be hereinafter described, it will beunderstood that the tape 19 will be unreeled from the supply reel withits tacky side upwardly, as shown in the drawings.

Between the frame plates 1?. and i2 is rotatably mounted a feed wheel inon the axis 21. This wheel as shown is provided wth side flanges 22about its periphery so as to provide between the flanges an annulargroove or recess .23 within which the tape is adapted to lie with itsnontacky side abutting the peripheral surface of the wheel between theflanges.

The wheel is provided with spaced notches 24 opening outwardly throughthe periphery of the wheel, the notches being formed in the flanges 22as well as the body of the wheel itself. These notches will be spacedaccording to the length of tape that is desired to Wrap around the bag,and the number thereof will depend upon the periphery of the wheel, fourof such notches being shown in the present instance. Rotatably mountedin slots 25 formed in the body of the wheel and extending through theouter periphery thereof are severing knives 26, there being one of theseknives for each of the notches 24, and the knives being placedrearwardly of the respective notches in relation to the direction ofrotation of the wheel. As shown, the plane of each knife is inclinedwith respect to the axis of the wheel so that the cutting edge 27 ofeach .knife, which projec from the periphery of the wheel between theflanges 22, is slightly on the bias with respect to the wheel.

Rotatably mounted between the frame plates 11 and i2 is a wiping andanvil roller designated generally by the numeral 3d. This roller, asshown in Fig. 4, is rotatably mounted on a pivot post Gil secured to theplate 11, and comprises a hub portion 32, a resilient body portion 33which may be of rubber or similar material, and an outer metal rim 34.As will be explained hereinafter, this wheel has two functions, one ofwhich is to engage the leading end of the tape forwardly of a notch 24,and wrap the tape about the neck of the bag. The other fear. tion is tocooperate with the biased cutting edge 27 of the severing members 26 toserve as an anvil to press the tape against the edge of the knife, andeffect the severance of the tape from the following length .upon thewheel.

Each of the frame plates 11 and 12 .is provided witha slot 35 of arcuateshape, this slot having the wheel axis as its center, and registeringwith the notches 24; that is, the radius of the slot is substantiallythe .same as the distance of the notches 24 from theaxis of thefeedwheel 20.

At the upper edge of the frame ,plates, the slot 35 communicates with.taperedslotted or mouth portions 37, so as to permit the entry of thegathered neck of .a bag through this month portion into one of the.notches 24. Adjacent their lower ends, the slots 35 are provided with ato the enlarged end portions 33, and then Withdrawn from the machine ina direction parallel to the axis 21 of the feed wheel.

A roller 40 is rotatably mounted upon the frame plate 11 (Fig. 1)between two pins 41, and the tacky side of the tape 19 is adapted toengage this roller in passing over these pins in order to place acertain amount of tension on the tape in order that it may be neatlywrapped about the neck of the bag. Also a knurled roller 4-3 isrotatably mounted upon the plate 11, this roller extending into thegroove 23 of the feed wheel, although its periphery will be out ofcontact with the surface of the wheel to permit the passage thereunderof the cutting edges of the severing members 26. This roller will,however, maintain the tape within the groove in position to span one ofthe notches 24 in the wheel. V

The length of the arcuate portion of the slot 35 is substantially thatbetween adjacent notches 24 so that when one of the notches registerswith the mouth of the enlarged opening 38, the next succeeding notchwill register with the slotted mouth portions 37. In order to releasablyhold the feed wheel in this position so as to secure properindexing ofthe wheel in its operation, a ball detent 44 is mounted in an opening inthe plate 11, the inner portion of the ball being received in one of thenotches as shown for example in Figs. 2, 3 and 8. The ball may be heldin place by means of a flat plate spring member 45 having an opening 46in which the outer end of the ball is received, and the tension of thisspring may be adjusted by means of an adjusting plate 47 adjustablysecured to the frame member 11 by means of a slotted opening 43 throughwhich is passed a screw or other fastening element 49. It will be seenthat by loosening the screw 4-9, the member 48 may be moved toward theend of the spring plate 45 so as to adjust the tension thereof.

The operation of the device may now be described. When the device is inrepose position, the length of tape 19 extending from the supply rollextends over the surface of the feed wheel within the groove 23, andspans the notch 24 which is in registration with the slotted mouthportion 37, as shown, for example, in Figs. 1 and 8. It will also beapparent that at this time the ball detent 44 registers with another ofthe notches 24, thus releasably holding the wheel in this position.

The gathered portion of the neck of a bag is then brought down throughthe slot 37 into one of the notches 24. This serves to press the tapedown into the notch 24, and cause the leading end thereof to projectupwardly, as shown at Sit in Fig. 5. The bag is then moved in a generally downward direction through the slots 35 of the plates 11 and 12.This moves the end 50 of the tape past the wiping and anvil roller 30 sothat the latter contacts the back or nontacky side of the tape, andcauses it to be wrapped neatly about the neck of the bag, the free endof the tape assuming the position shown at 51 in Fig. 6.

Upon a continuation of movement of the bag, and, of course, the feedwheel 20, the parts reach the position shown in Fig. 7, wherein the freeend of the tape which lay upon the forward side of the notch 24 has beenpressed flatly against that portion of the tape on the rear side of thenotch so as to seal the two plies together about the neck of the bag. Atthis time, the cutting edge 27 of the severing member 26 engages the rim34 of the roller 30, and effects the severance of the tape justrearwardly of the free end thereof.

Upon a continued movement of the bag and feed wheel, the parts reach theposition shown in Fig. 8, wherein the notch 24 registers with the mouthof the opening 38 so as to permit the neck of the bag to be drawn intothis enlarged opening, and withdrawn from the machine substantiallyparallel to the axis of the feed wheel. At this time, it will be notedthat the ball detent 44 registers with one of the notches 24 so as tohold the feed wheel releasably in this position and prevent overrunningthereof, in order that the next succeeding notch 24 will register withthe slotted mouth 37. It may also be noted that, in this position, theleading edge of the portion of the remaining tape connected to thesupply roll will, as shown at 52, lie upon the surface of the wheelspanning the next succeeding notch 24. The extreme end of the tape willbe adja -nt the wiping and anvil wheel 30, but will adhere only lightly,if at all, to this wheel so that upon the introduction of another baginto the succeeding notch 24, the leading end of the tape will be freeto swing upwardly and as the position shown in Fig. 5.

it will be noted that, rearwardly of each severing member, the feedwheel is provided with a relieved or cut-away portion providing a fiatsurface 54 spaced slightly from the roller 30 so that, after thesevering operation, the free end of the tape will not be held betweenthe roller 30 and the feed roller, thus permitting the latter to moveforward, independently of the tape, from the position shown in Fig. 7 tothat shown in Fig. 8, permitting the free end of the tape to swingupwardly when the next operation is be 11.

gv hile I have shown and described one embodiment of my invention, itwill be understood that it is not to be limited to all of the detailsshown, but is capable of modification and variation within the spirit ofthe invention and within the scope of the claims.

What I claim is:

l. A bag-tying machine comprising a frame, a feed wheel rotatablymounted on the frame provided with a peripheral notch, means forsupporting a roll of pressure-sensitive tape in position for a lengththereof to lie on the periphery of the wheel spanning said notch withits tacky side outwardly, said frame having an arcuate slot thereindescribed about the axis of said wheel and registering with said notchwhereby the wheel maybe turned by movement of the bag, said slot openingthrough an edge of the frame to permit the gathered neck of the bag tobe inserted in said notch, a roller member rotatably mounted on theframe with its periphery adjacent the periphery of the feed wheel toengage the back of the leading end of the tape and fold it around theneck of the bag in said notch, and a severing member mounted on thewheel to sever the tape at a point rearwardly of the notch.

2. A bag-tying machine comprising a frame, a feed wheel rotatablymounted on the frame provided with a peripheral notch, means forsupporting a roll of pressuresensitive tape in position for a lengththereof to lie on the periphery of the wheel spanning said notch withits tacky side outwardly, said frame having an arcuate slot thereindescribed about the axis of said wheel and regis tering with said notchwhereby the wheel may be turned by movement of the bag, said slotopening through an edge of the frame to permit the gathered neck of thebag to be inserted in said notch, a roller member rotatably mounted onthe frame with its periphery adjacent the periphery of the feed wheel toengage the back of the leading end of the tape and fold it around theneck of the bag in said notch, and a severing member carried by thewheel and projecting from the surface thereof to engage the tape and cutit against said roll member.

3. A bag-tying machine comprising a frame, a feed wheel rotatablymounted on the frame provided with a peripheral notch, means forsupporting a roll of pressuresensitive tape in position for a lengththereof to lie on the periphery of the Wheel spanning said notch withits tacky side outwardly, said frame having an arcuate slot thereindescribed about the axis of said wheel and regis tering with said notch,said slot opening through an edge of the frame to permit the gatheredneck of the bag to arran es be inserted in said notch, a roller member.rotatably mounted on the frame with its periphery adjacent the.

periphery of the feed wheel to engage the back of the leading end of thetape and fold it around the neck of the bag in said notch, a severingmember carried by the wheel, rearwardly of the notch therein withrespect to the direction of travel .of the wheel, and projecting fromthe surface thereof to engage the tape and cut it against said rollmember, and said roller tmember cooperating with said severing member.to press the tape thereagainst as the severing member is carried pastthe roller member by rotationof the feed wheel.

4. A bag-tying machine comprising a frame, a feed wheel rotatablymounted on the frame provided with a peripheral notch, means forsupporting a roll of pressuresensitive tape in position for a lengththereof to lie on the periphery of the wheel spanning said notch withits tacky side outwardly, said frame having an arcuate slot thereindescribed about the axis of said wheel and registering with said notch,said slot opening through an edge of the frame to permit the gatheredneck of the bag to be inserted in said notch, a roller member rotatablymounted on the frame with its periphery adjacent the periphery of thefeed Wheel to engage the back of the leading end of the tape and fold itaround the neck of the bag in said notch, 21 severing member carried bythe,

wheel, rearwardly of the notch therein with respect to the direction oftravel of the wheel, and projecting from the surface thereof to engagethe tape and cut it against said roll member, and said roller memberbeing yieldable in a direction away from the feed wheel.

5. A bag-tying machine comprising a frame, a feed wheel rotatablymounted on the frame provided with a peripheral notch, means forsupporting a roll of pressuresensitive tape in position for a lengththereof to lie on the periphery of the wheel spanning said notch withits tacky side outwardly, said frame having an arcuate slot thereindescribed about the axis of said wheel and registering with said notch,said slot opening through an edge of the frame to permit the gatheredneck of the bag to be inserted in said notch, a roller member rotatablymounted on the frame with its periphery adjacent the periphery of thefeed wheel to engage the back of the leading end of the tape and fold itaround the neck of the bag in said notch, a severing member carried bythe wheel, rearwardly of the notch therein'with respect to the directionof travel of the wheel, and projecting from the surface thereof toengage the tape and cut it against said roll member, and the cuttingedge of the severing member being disposed on the bias with respect tothe axis of the wheel.

6. A bag-tying machine comprising a frame, a feed Wheel rotatablymounted on the frame provided with a peripheral notch, means forsupporting a roll of pressuresensitive tape in position for a lengththereof to lie on the periphery of the wheel spanning said notch withits tacky side outwardly, said frame having an arcuate slot thereindescribed about the axis of said wheel and registering with said notch,said slot opening through an edge of the frame to permit the gatheredneck of the bag to be inserted in said notch, a roller member rotatablymounted on the frame with its periphery adjacent the periphery of thefeed wheel to engage the back of the leading end of the tape and fold itaround the neck of the bag in said notch, a severing member carried bythe wheel, rearwardly of the notch therein with respect to the directionof travel of the wheel, and projecting from the surface thereof toengage the tape and cut it against said roll member, and one of saidmembers being yieldable relatively to the other to permit the severingmembet to pass the roller member upon rotation of the wheel.

7. A bag-tying machine comprising a frame, a feed wheel rotatablymounted on the frame provided with a *eripheral notch, means forsupporting a roll of pressuresensitive tape in position for a lengththereof to lie on the periphery of the wheel spanning said notch withits tacky side outwardly, said frame having-an arcuate slot thereindescribed about the axis of said wheel and registering with said notch,said slotopening through an edge of the frame to permit the gatheredneck of the bag to be inserted in said notch, a roller member rotatablymounted .on the frame with its periphery adjacent the periphery of thefeed wheel to engage the back of the leading end of the tape and fold itaround the neck of the bag in said notch, a severing member carried bythe wheel, rearwardly of the notch therein with respect to the directionof travel of the wheel, and projecting from the surface thereof toengage the tape and out it against said roll member, and the peripheralsurface of the feed wheel being relieved rearwardly of the severingmember to permit the end of the tape to lie freely between the rollmember and the periphery of the feed wheel.

8. A bag-tying machine comprising a frame, a feed wheel rotatablymounted on the frame provided with a peripheral notch, means forsupporting a roll of pressuresensitive tape, tacky on one side only, inposition for a length thereof to lie on the periphery of the wheelspanning said notch with its tacky side outwardly, said frame having anarcuate slot described about the axis of said wheel and registering withsaid notch, said slot opening through an edge of the frame to permit thegathered neck of a bag to be inserted in said notch whereby the wheelmay be turned by movement of the bag, a severing member carried by thewheel rearwardly of the notch therein, with respect to the direction ofrotation of the wheel, and a combined wiping and anvil roll. memberrotatably mounted on the frame to engage the nontacky side of the tapewhen the wheel is rotated and fold the free end thereof around the bagand serve as an anvil against which the severing member severs the tape.

9. A bag-tying machine comprising a frame, a feed wheel rotatablymounted on the frame provided with a peripheral notch, means forsupporting a roll of pressuresensitive tape, tacky on one side only, inposition for a length thereof to lie on the periphery of the wheelspanning said notch with its tacky side outwardly, said frame having anarcuate slot described about the axis of said wheel and registering withsaid notch, said slot opening through an edge of the frame to permit thegathered neck of a bag to be inserted in said notch whereby the wheelmay be turned by movement of the bag, a severing member carried by thewheel rearwardly of the notch therein, with respect to the direction ofrotation of the wheel, a combined wiping and anvil roll member rotatably mounted on the frame to engage the nontacky side of the tapewhen the wheel is rotated and fold the free end thereof around the bagand serve as an anvil against which the severing member severs the tape,said roll member being mounted on a fixed axis, and one of said roll andsevering members being yieldable relatively to the other.

10. A bag-tying machine comprising a frame, feed wheel rotatably mountedon the frame provided with a peripheral notch, means for supporting aroll of prossure-sensitive tape, tacky on one side only, in position fora length thereof to lie on the periphery of the wheel spanning saidnotch with its tacky side outwardly, said frame having an arcuate slotdescribed about the axis of said wheel and registering with said notch,said slot opening through an edge of the frame to permit the gatheredneck of a bag to be inserted in said notch whereby the wheel may beturned by movement of the bag, a severing member carried by the wheelrearwardly of the notch therein, with respect to the direction ofrotation of the wheel, a combined wiping and anvil roll member rotatablymounted on the frame to engage the nontacky side of the tape when thewheel is rotated and fold the free end thereof around the bag and serveas an anvil against which the severing member severs the tape, and

notches, and a severing member is disposed rearWardly of each notch andwherein means are provided to index said Wheel with one of said notchesregistering with the opening of said slot through the edge of the frame.

12. A bag-tying machine as in claim 1 wherein the feed wheel is providedwith a plurality of peripheral notches, a severing member is disposedrearwardly of each notch and wherein means are provided to index saidwheel with one of said notches registering with the opening of said slotthrough the edge of the frame, and

said indexing means comprises a spring-pressed detent 15 mounted on theframe to engage one of said notches in the wheel.

References Cited in the file of this. patent UNITED STATES PATENTS BuhseNov. 10, 1914 1,193,506 Brown Aug. 8, 1916 1,823,597 Foulder Sept. 15,1931 2,223,017 Abrams Nov. 26, 1940 2,514,453 Miller July 11, 19502,536,455 Miller Jan. 2, 1951 2,543,323 Marsh Feb. 27, 1951 2,651,900Heilman Sept. 15, 1953 2,762,179 Young Sept. 11, 1956

